So this is pretty damn cool. Last night, Pearl Jam closed Philadelphia's Made in America festival with what was, by all accounts, a rocking two-hour set. The band even played "Jeremy," "Alive," and "Even Flow," three tracks from its first album that don't get played much in concert anymore.

The last song of the night might have been the most special, though. Pearl Jam was joined on stage by Jay-Z, and the two went through a blistering version of "99 Problems" to close the festival. Check it out above.